Upgrade Scan Engine to Cloud Protector

We recently learned that we cannot renew our license to the Scan Engine 5.2 but have to upgrade to the Cloud Protector 7.0. We would have to do extensive testing before I can deploy a new product in our production environment. I am not familiar with the product. So 1) how "different" is the product? (ie is it just a rebranding of the Scan Engine and this is simply a software upgrade; 2) can we install a Cloud Protector license on the Scan Engine until such time that we can evaluate the new product and 3) if we cannot use the Cloud Protector license does the Scan Engine simply stop working when the license expires? Thanks in advance.